Steam-boiler.



PATENTED APR. 14, 190,3.

G. CAWLEY.

STEAM BOILBB..

APPLIUATION FILED JUNE s. 1902.

'H0 MODEL.

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UNITED STATES PATENT rrron.

GEORGE CAWLEY, OF WESTMINSTER, ENGLAND.l

SPECIFICATION formingvpartiof Letters Patent No. 725,540, dated April14, 1903.

Application niet im 3,1902. sentito. 110,119. (N0-mnu.)

vention, such as will enable others skilled in the art to whichv it'appertains to make 'and use the same.

My invention relates to a circulatory system for the steam-boilersoflocomotive-engines wherein connection is made between the fire-box endofthe boiler and the smokebox end by means of a passage in which is amud-collecting chamber; and my invention has for its object to provideimproved means on this principle whereby a'better circulation of theWater is obtained and solid matter ormud is more eicientlydeposited andcollected.

To this end my invention consistsl of the following arrangement andcombination of parts.

lss

The accompanying drawing represents a locomotive-boiler providedwith'van arrangement in accordance with my invention, the saidarrangement being in longitudinal section. o

At the smoke-box endB of the boiler A, where the heating-surfacehasarelatively low evaporative effect, I connect a pipe D, and as an axle ofthe locomotive has to be accommodated and the pipehas to protrude fromthe l boiler at some little distance from the end the said pipe iscontinued near to the said end B by a passage inside the boiler andinclosed between the bottom thereof and the plate C and constituting acontinuation of the pipe D. The said Apipe D is vertically' disposed andopens into a chamber E of a capacity such as to reduce the velocity ofthey flow of water through the said chamber. A baffle-plate F is fixednear the ,upperl part of this chamber E, so as not' to obstruct theoutlet for water from the pipe D,and from the space above this plate Fopensv the pipe I, which pipe I extends to the fire-box end of theboiler and cornmunicates with the water-space around the said re-box bya number of branch pipes J J, so as to cause the Water to be distributedthroughout the said space.

G is a cock by which deposit can be' removed from the chamber E. Ifpreferred, the removal can be effected by taking oif the end cover ofthe said chamber E.

Water passes from the extremity of the smoke-box end of the boilerthrough the passage C and down the pipe D into the chamber E, where, asthe flow of water is vertically 4downward and thevelocity of flow isreduced, Vsolid matter or mud deposits from the water,

the baffle-plate F (while not interfering with the incoming water)keeping this place of deposit comparatively quiescent and directing theiiow of water along the upper surface H of the chamber E, so that thedeposit in the lower part of the chamber E may be disturbed as little aspossible.

space surrounding the tire-box in such'a way as to be distributedtherein, andthe water ascends and passes back to the extremity of thesmoke-box end of the water-space of the boiler, thereby inducing a verystrong and continuous circulation of Water through the The water leavesthey vchamber E by Ythepipe I and enters the waterwhole of the boilerfrom end to end and' through pipes and chamber aforesaid, increasing theevaporative efficiency and working durability of the' boiler. v

l claim as my invention'v l. In locomotive steam-boilers, a passagegiving communication between the part of the boiler where the heatingeect is lowest and the part of the water-space surrounding the fire-box,the said passage beingprovid'ed with a. number of branches which enterthe giving communication between ythe part of c the boiler where theheating eifect is lowest and the water-space surrounding the lire-boxand a depositing-chamber included in the said IOC passage, the portionof the passage by which ings at some distance apart, substantially as xowater enters the said chamber being Vert-ical described. l

and continued to the smoke-box end of the In testimony whereof I am); mysignature interior of the boiler, by an internal passage in presence oftwo Witnesses.

and a baftieplate interposed between the lower part of the said chamberand the outlet GEORGE CAWLEY of Water therefrom, and a branch openin gont Witnesses:

of the chamber and communicating With the ERNEST ARNOLD,

water-space sn'rrounding the fire-box by open- PERCY READ GOLDRING.

